变位系数对超高转速齿轮副的疲劳寿命优化  

Optimization of Fatigue Life of Ultra-High Speed Gear Pair by Modification Coefficient

作　　者：李刘伟 程鲲[1] LI Liu-wei;CHENG Kun(School of Manufacturing Science and Engineering,Southwest University of Science and Technology,Sichuan Mianyang621000,China)

机构地区：[1]西南科技大学制造科学与工程学院,四川绵阳621000

出　　处：《机械设计与制造》2021年第1期245-249,共5页Machinery Design & Manufacture

基　　金：四川省教育厅重点项目(18zd1147)。

摘　　要：为了研究变位系数对超高转速、冲击载荷下齿轮系统传动系统的疲劳寿命的影响,文中采用三维建模软件NX10.0对现有绿篱机的高速齿轮副进行了建模,通过有限元分析软件ANSYS对其进行了变形量与最大主应力分析,以及完成了综合使用寿命的计算,根据木桶原理,得出现有变位系数选取不合理。文中分别对主、从动齿轮在对应的变位系数取值区间范围内进行多组取值分析计算,在等强度设计原则下,对此处齿轮副变为系数进行了优化。优化后的主、从动齿的最大变形量分别减小了1.16%,16.01%,以及该对齿轮副的使用疲劳寿命提升了9.01倍。这对该款绿篱机的后续优化提供了指导意义。In order to study the influence of the coefficient on the fatigue life of the gear transmissionsystem under the ultrahigh speed and impact load.There modeled the high speed gear pair with existing hedge trimmerby the 3D modeling software NX10.0,andanalyzed the deformation amount and the maximum principal stress by the finite element analysis software ANSYS,finally completed the calculation of the comprehensive service life.According to the wooden barrel principle,the existing modification coefficientselection is unreasonable.In the paper,there has analyzed and calculated in the range of the corresponding modification coefficient to the main and driven gears.Under the principle of equal strength design,it had optimized modification coefficient to the gear pair.The results show that the maximum deformation of the optimized main and driven teeth is reduced by 1.16%and 16.01%,respectively,and the fatigue life of the pair of gear pairs is increased by 9.01 times.This provides guidance for the subsequent optimization of the hedge trimmer.

关 键 词：超高转速 冲击载荷 变位系数 有限元分析 

分 类 号：TH16[机械工程—机械制造及自动化] TH12[机械工程—机械设计及理论]